"Then the Lord rained down burning sulfur on Sodom and Gomorrah—from the Lord out of the heavens. 25 Thus he overthrew those cities and the entire plain, destroying all those living in the cities—and also the vegetation in the land." - Genesis 19:24-25
Sources:
Research Paper: The Civilization-Ending 3.7KYrBP Event: Archaeological Data, Sample Analyses, and Biblical Implications
Science News: An exploding meteor may have wiped out ancient Dead Sea communities
Tall El-Hammam Research Site: Discoveries
Wikipedia: Sodom and Gomorrah